# Dispersion forces between weakly disordered Van der Waals crystals

## TL;DR

This paper develops a many-body theory to analyze how weak disorder affects interlayer dispersion forces in atomically thin Van der Waals crystals, revealing that disorder weakens these forces contrary to common expectations.

## Contribution

It introduces a novel theoretical framework for understanding the impact of weak disorder on dispersion forces in layered materials, highlighting the weakening effect and altered scaling laws.

## Key findings

- Disorder weakens interlayer dispersion forces.
- Disorder alters the scaling laws of dispersion forces.
- Maximally crossed vertex corrections are relevant for resistivity divergences.

## Abstract

We describe a many-body theory for interlayer dispersion forces between weakly disordered atomically thin crystals and numerically investigate the role of disorder for different layer-separation distances and for different densities of induced electrons and holes. In contrast to the common wisdom that disorder tends to enhance the importance of Coulomb interactions in Fermi liquids, we find that short range disorder tends to {\it weaken} interlayer dispersion forces. This is in line with previous findings that suggest that transitioning from metallic to insulating propagation weakens interlayer dispersion forces. We demonstrate that disorder alters the scaling laws of dispersion forces and we comment on the role of the maximally crossed vertex-correction diagrams responsible for logarithmic divergences in the resistivity of two-dimensional metals.